You need to enable JavaScript to run this app.
Camp Apex
Learn
All
Apex Fundamentals
Deep Dive
Object Oriented Programming
SOQL 101
DML
Practice & Projects
All Practice
Projects
Flow into Apex
Playground
Events & Contests
Advent 2025
Advent 2024
Apex Week of Horror
Compete
About
Login
Collections
Flow Into Apex
Variables
Scope
Design Patterns - Builder
Conditionals
Loops
Lists
Maps
Sets
Methods
Classes
SObjects
OOP Beginner
DML (Data Manipulation Language)
Collections
4
Collections 0/4
Practice Lists, Sets, and Maps
Problem
Difficulty
Status
Account with Highest Total Opportunity Amount
No difficulty
Not Started
Has Dupes
No difficulty
Not Started
Filter Contacts by Zip Code
No difficulty
Not Started
Smallest Number
No difficulty
Not Started